LM3679URX-1.2/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3679URX-1.2/NOPB is a synchronous step-down DC-DC converter from Texas Instruments, designed for ultra-low profile applications. It operates with an input voltage range of 2.5 V to 5.5 V and provides a fixed output voltage of 1.2 V. The device delivers a maximum output current of 350 mA at a switching frequency of 3 MHz. It features an operating supply current of 1.6 mA and supports an ambient temperature range of -30°C to 85°C. The component utilizes a 5-XFBGA package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification for improved efficiency in compact designs
• Ultra-low profile construction suitable for space-constrained devices
• High switching frequency enables the use of small external components

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring low profile power solutions
• Battery-powered devices needing efficient step-down conversion
• Embedded systems with strict height limitations

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance and RoHS adherence as per Texas Instruments standards. Confirm the 'URX' designation corresponds to the correct reel packaging quantity and tape-and-reel format required for your assembly line equipment. Ensure the fixed 1.2V output variant matches the target circuit design requirements before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.2V output is required within a 2.5V to 5.5V input range. The 350mA current capability suits light-load portable applications. Consider the 3MHz switching frequency for minimizing passive component size. Verify that the 5-XFBGA package footprint fits the PCB layout constraints and thermal management strategy for the intended operating environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3679 series of miniature step-down converters. It is distinct from higher-current variants like the LM2679 series, which offer up to 5A output but require larger packages and lower switching frequencies. The LM3679 focuses on miniaturization and low quiescent current rather than high-power delivery.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-to-pin replacements are limited due to the specific 1.2V fixed output and 350mA rating. Check for other LM3679 variants with different output voltages if system requirements change. Cross-reference with newer Texas Instruments buck converters offering similar current and package dimensions if updated versions are available.